Input interpretation
roentgenium (chemical element)
Periodic table location
Periodic table location
Basic elemental properties
![atomic symbol | Rg atomic number | 111 short electronic configuration | [Rn]7s^15f^146d^10 Aufbau diagram | 6d 5f 7s block | d group | 11 period | 7 atomic mass | 281 u (unified atomic mass units) (atomic mass number given for longest-lived known isotope) half-life | 10 minutes](../image_source/48662feaa8b9ce3aff2d05a411efbc84.png)
atomic symbol | Rg atomic number | 111 short electronic configuration | [Rn]7s^15f^146d^10 Aufbau diagram | 6d 5f 7s block | d group | 11 period | 7 atomic mass | 281 u (unified atomic mass units) (atomic mass number given for longest-lived known isotope) half-life | 10 minutes
Atomic properties
term symbol | ^2S_(1/2) (electronic ground state properties)
Abundances
solar abundance | 0 mass% meteorite abundance | 0 mass% crust abundance | 0 mass% ocean abundance | 0 mass% human abundance | 0 mass% solar molar abundance | 0 mol% meteorite molar abundance | 0 mol% ocean molar abundance | 0 mol% crust molar abundance | 0 mol% human molar abundance | 0 mol%
Nuclear properties
half-life | 10 min lifetime | 14.5 min (rank: 1st) specific radioactivity | 2.463×10^6 TBq/g decay mode | alpha emission unstable isotopes | Rg-283 (10 min) | Rg-282 (200 s) | Rg-281 (60 s) | Rg-280 (10 s) | Rg-279 (3 s) | Rg-278 (1 s) | Rg-277 (1 s) | Rg-276 (100 ms) | Rg-275 (10 ms) | Rg-274 (5 ms) | Rg-273 (5 ms) | Rg-272 (2 ms)
Identifiers
CAS number | 54386-24-2